moegan



(No Model.)

O. H. MORGAN.

ROLLER MILL.

No. 341,342. Patented May l, 1886.

Ji/on 01/6,

UNITED STATES CHARLES H. MORGAN, OF BUFFALO,

NEW YORK, ASSIGFOR TO RICHARD K. NOYE, OF SAME PLACE.

RO-LLER-MILL.

SPECIFICATION forming part of Letters Patent No. 341,342. dated May 4, 1886.

Application tiled January 11, 1886.

T aZZ whom, it may concern:

Be it known that 1, CHARLES H. MORGAN, of the city of Buffalo, in the county of Erie and State of New York, have invented new and useful Improvements in Roller-Mills, of which the following is a specification.

This invention relates to an improvement in the adjusting devices employed in roller-mills which are used for the reduction of grain and similar substances in the manufacture of flour and the like. In rollermills of this class one of the rollers is journaled in movable bearings,

justable roller independently.

which are provided with adjusting devices, whereby each bearing can be moved toward and from the opposing roller, thereby affording means for adjusting each end of the ad This adjust ment is resorted to for rendering the two rollers parallel with each other. Both adjusting devices of the movable bearings are con uected by an adjusting mechanism which permits both bearings to be adjusted simultaneously and with great nicety, thereby affording means for increasing or reducing the space between the opposing faces of the rollers and adapting the same to the reduction of coarse or fine material, as may be required. This fine simultaneous adjustment of the roller is resorted to whenever it is necessary to change the grinding adjustment of the rollers. This common adjusting mechanism of both bearings of the adjustable roller is further provided with a spreading device, whereby both movable bearings can be simultaneously moved a considerable distance from the opposing roller and be returned to their former position without disturbing the grinding adjustment of the rollers. This adjustment is resorted to when it isnecessary to separate the rollers quicklyfor instance, in stopping and starting the mill. Roller-mills provided with such adjusting devices are described in Letters Patent of the United States No. 304,468, dated September 2, 1884, and No. 310,374, dated January 6, 1885.

The object of my invention is the construction of a simple and efficient spreading device of this kind; and my invention consists to that end of the improvement which will be Serial No. 189,169. (No model.)

hereinafter fully set forth, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a fragmentary sectional plan view of a rollermill provided with my improved spreading device. Fig. 2 is a sectional side elevation of the spreading device, on an enlarged scale. Fig. 3 is an end view of the same. Figs. 4, 5, and (5 are cross-sections in lines w 00, y 3 and z 2, Fig.2, respectively. Fig. 7 is a fragmentary side elevation of the spreading device,showing the parts in the position in which the rollers are separated.

Like letters of reference refer to like parts in the several figures.

A represents the roller, which is mounted in movable bearings, and A the opposing roller, which may be mounted in fixed bearings.

a a representthe movable bearings in which the roller A is journaled, and B the stationary frame of the machine, upon which the bearings a. move toward and from the roller A in adjusting the roller A.

0 represents lugs formed on the frame B, and C represents horizontal tubular screws arranged in screw-threaded openings in the lugs c.

0 represents screw-11 uts applied to the inner ends of the screws C, and 0 represents springs, which are interposed between the nuts 0 and bearings a, for pressing the latter toward the roller A. i

(1 represents horizontal screw-rods passing lengthwise through the screws C, and secured adjustably with their inner ends to the bearings a.

D represents hand-wheels, secured to the outer ends of the screw-rods (I. These parts constitute the weltknown adjusting devices whereby each bearing a is adjusted independently and enabled to yield when particles of abnormal size or hardnessenter between the rolls.

0 represents collars, mounted upon the screwrods (1 on the inner sides of thehand-wheels D.

E represents levers, which have their fulcrums on brackets f, secured to the screws C, and which bear with theirshort outer arms against the collars e. The inner ends of these levers straddle a horizontal stud, G, which is secured with its rear end to alug or standard, 9, attached to the main frame B. The inner ends of these levers are moved simultaneously by an adjusting-screw, which adjustment is transmitted to both bearings aa by the rods 0, thereby adjusting both bearings simultaneously for increasing or reducing the space between the rolls. These devices for regulating the grinding adjustment are also old and well known.

H represents a yoke or open frame, which is loosely mounted on the stud G, so as to be capable of sliding lengthwise on the same. The opening of the yoke H receives the inner ends of both levers E, so that by moving the yoke backward or forward 011 the stud G the levers are simultaneously moved.

I represents a screw-nut, which is applied to thescrewth readed front portion of the stud G, and which bears against the outer end of the yoke H. By adjusting the nut I on the stud G the yoke H is moved, and both levers are simultaneously adjusted with great nicety for regulating the grinding adjustment or space between the rolls, as already described.

J represents the spreading-lever, which is pivoted by a bolt, j, to one side of the stud G in rear of the yoke H. The downwardly-extending short arm j of the spreading-lever J is connected with the rear end of the yoke H by a rod, L, so that by moving the long arm j of the spreading lever the yoke H is moved on the stud without disturbing the screw-nut I. The pressure of the springs 0 draws the outerends of the levers E backward and holds the inner ends of the levers against the outer end of the yoke H and the latter against the screw-nut I, as shown in Fig. 2.

hen it is desired to spread or separate the rolls, the long arm j" of the spreading lever J is depressed or swung forwardly, as indicated by dotted lines in Fig. 2, whereby the yoke H is drawn backwardly on the stud G, as represented in Fig. 7. This movement of the yoke draws the inner ends of the levers E backwardly and moves the outer ends of the levers forwardly, together with the bearings a, which are connected with the outer ends of the levers by the rods (1. The long arm j of the spreadinglever is depressed until it rests on the screw-nut I, and when it reaches this position the short arm j has passed above the horizontal line or dead-center, as indicated in Fig. 7, so that the pressure of the springs 0 .now tends to hold the spreading-lever J in this depressed position. hen the yoke has been moved forward on the stud G, as above described, the nut I is free on the stud and relieved from the pressure of the springs 0 In order to avoid all liability of the nut to be moved out of its true position under these circumstances by the jarring of the mill, the edge of the nut is milled or notched, and the lever J is provided with an edge, It, which on ters one of the notches of the nut and thereby locks the same in position. Vhen it is de sired to return the adjustable roller to its working position, the lever J is swung backwardly until the return movement of the yoke H is arrested by the nut I, which latter forms a stop and insures the return of the adjustable roller to its former grinding adjustment. This return movement of the parts is greatly facilitated by the pressure of the springs c after the rod L has passed the dead-center.

My improved adjusting device is very sim ple in construction, very efficient and durable, and can be produced at comparatively small expense. 7

I claim as my invention'-- 1. The combination, with the bearings of the adjustable roller and the levers E, con

nected with said bearings, of a movable yoke or frame, H, connected with the adjacent ends of said levers, a stop, 1', against which the' yoke rests, a pivoted spreading-lever, J, and a rod, L, connecting the lever J with the yoke or frame H, substantially as set forth.

2. The combination, with the bearings of the adjustable roller and the levers E, con nected with said bearings, of a screw-threaded stud, G, a yoke, H, mounted on saidstud, a pivoted spreading-lever, J, a rod, L, connecting the lever Jwith the yoke or frame H, and a screw-nut, I, applied to the stud G, sub stantially as set forth.

3. The combination, with the levers E and stud G, of the yoke H, pivoted spreadinglever J, pro ided with an edge, 7;, connectingrod L, and a screw-nut, I, having a notched edge adapted to interlock with the edge of the spreading-lever, substantially as set forth.

WVitness my hand this 29th day of December, 1885.

OH ARLES H. MORGAN.

\Vitnesses: V

OSCAR SoHAUB, CARL F. GEYER. 

